Open day refers to the working day when customers can purchase and redeem open-end funds. The fund establishment date refers to the date when the fund manager announces the establishment of the fund after the fund meets the establishment conditions.

For open-end funds, under normal circumstances, any working day should be able to handle the purchase, conversion, redemption and other businesses for investors. However, when the fund continues to purchase and expand its scale, in order to protect the rights and interests of investors, the fund company can take measures to suspend the subscription conversion business within a certain period of time to control the excessive expansion of the fund scale; Sometimes, fund companies may also take measures to suspend redemption.

During the working days during this period, the fund is closed, that is, the subscription, conversion and redemption business are suspended. On other working days, when the fund is open, it can handle subscription, conversion and redemption for investors. This working day is an open day. The definition of fund open day is as follows.